Hernial truss.



Patented May I3, i902 P. FREDN.

HERNIAL TRUSS.

(Application med Feb. 14, 1902.)

(No Windel.)

TH: Noms pmznspo., womuma. wAsmNmoN, n. c.

UNTTED STATES PATENT CFFICE.

PERJOHAN FREDI, OF BRIDGEPORT, CONNECTICUT.

HERNIAL TRUSS.

SPECIFICATION formingpart of Letters Patent No. 699,797, dated May 13, 1902.

Application filed February 14,1902. Serial No. 94,080. (No model.)

ings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specication, and represent, in-

Figure l, a top or plan view of a truss constructed in accordance with my invention; Fig. 2, a side view of the same; Fig. 3, atransverse sectional view; Fig. 4, a broken seetional View illustrating a modified form of valve.

This invention relates to an improvement in trusses, and particularly7 to that class in which a. pneumatic pad is employed in connection with a cup-shaped holder, and is an improvement upon the invention for which Letters Patent of the United States No. 504,158 were granted to me August 29, 1898. In my previous patent the pad is adapted to be filled through a tube, the end of which was clamped between a holder and an arm by which the holder was secured to the belt.

The object of this invention is to arrange a valve in the center of the holder and have it extend through the plate or arm by which the holder is secured to the belt, and so that the holder will be clamped to the arm in part through the medium of the said valve.

Another object of the invention is to properly support and hold the pad in position and to employacomparatively flat pad 5 audit consists in the construction hereinafter described, and particularly recited in the claims.

Within the pad A, which is of rubber or other suitable material adapted to be indated, is a sheet-metal concave-convex disk B, and over the pad and disk is a cup-shaped holder C, substantially like holders in my previous patent, except that it is not `necessarily perforated and is comparatively shallow. Extending through central openings in the top of the disk, pad, and arms by which the holder is secured to the usual belt is a sleeve E, having a nange F, which bears against the inner face. of the disk B. This sleeve projects above the top of the arm D and is eX- ternally threaded to receive a screw-cap G, which being turned upon the sleeve E clamps the several members together. Within the pad and securedV to the disk B is a cup-like shell I-I, having perforations I, and in this shell is a vertically-movable plunger J, having a valve-disk K, which is adapted to close the opening in the sleeve E, a spring Lbeing placed around the plunger between the inner face of the shell I-I and the valve-disk K, the

tendency of which is to force the valve-disk into engagement with the sleeve E and its flange F. The sleeve E may be internally threaded to adapt it to be coupled with a pneumatic pump. Like my previous pads, the arm D is adapted to be secured to the holder C by a screw M. The outer end of the arm is also provided with a slot N, by which the arm is connected to the usual belt, (not shown,) and around the outer end of this slot are series of holes O, adapting the arm to be secured in various positions of adjustment. The cap G being removed, air may be forced into the pad, as the plunger .I will yield against outward pressure, and when that pressure is released the spring immediately forces the valve-disk to its seat and closes the outlet.

Instead of the valve arrangement above described, and clearly shown in Fig. 3 of the drawings, I may use any well-known valve construction. Thus in Fig. t of the drawings I have shown a well-known form comprising an externally-threaded cup P, having a iange Q at its upper end and adapted to be turned into a nut R within the pad, so that the several sections will be clamped together. This cup P is also internally threaded to receive a cup-like plug S, which plug is formed with an openingTatits lowerend,adapted whenraised above the bottom to permit air to enter or escape throughaholeUin the bottom of the cup P. I therefore do not wish to be understood as limiting the invention to the exact form of valve shown, but hold myself at liberty to make such changes and alterations therein as fairly fall within the spirit and scope of my invention.

l-Iaving fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- l. A truss comprising an niiatable pad, a disk within said pad, a holder and arm there- IOO for, a valve sleeve extending through said ing through said disk, pad and holder, means v disk and holder, and a valve to elose the said for clamping said sleeve in position, a valve sleeve substantially as described. mounted Within the pad and adapted to close I5 2. A truss comprising an inflatable pad, a the inner'end of said sleeve substantially as 5 disk within said pad, a holder to receive the described. v

same,l a. Valve-sleeve extending through said In testimony whereof I have signed thisl disk, pad and holder, means for clamping the specification in the presence of two subscribdsk, pad and holder together, and a valve to ing witnesses.

close said sleeve substantially as described. PERJOHAN FREDIN. 1o 3. A truss comprising an inflatable pad, a Witnesses:

disk within the same, a holder adapted to eon- FREDERIC C. EARLE, tainl the pad and disk, a valve-sleeve extend- G. JOHNSON. 

